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    Column Addition: 45 + 12

    Addition with Regrouping Calculator
    First addend
    Second addend

    What is 45 + 12?

    Answer

    45 + 12 =
    57

    No regrouping: each column is added on its own

    45 + 12 in a column. No carries.
    4 5
    +12
    57

    Column by column: 45 + 12

    • Ones: 5 + 2 = 7 — write 7.
    • Tens: 4 + 1 = 5 — write 5.

    45 + 12 = 57

    Second check: 57 − 45 = 12

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    45 + 12 = 57 - Column Addition. 45 + 12 = 57. Column addition step by step: no carrying, every digit of the sum and a subtraction check.
    https://calculat.io/en/number/long-addition/45--12/generated.jpgCopy

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    Recalculate with different values ↑

    FAQ

    What is 45 + 12?

    45 + 12 = 57

    How do you check that 45 + 12 = 57?

    Subtract one addend from the sum: 57 − 12 = 45, and 57 − 45 = 12. Getting the other addend back means the sum is right.

    How many carries are there in 45 + 12?

    None: no column adds up to 10 or more, so every digit of the sum is written straight away.

    Is 12 + 45 the same as 45 + 12?

    Yes. Addition is commutative, so both give 57; the column looks the same with either number on top.

    See Also